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Which types of thermometers are permitted for measuring food temperatures?

  1. Glass, digital, bimetallic stem

  2. Bi-metallic stem, thermocouple, thermistor

  3. Only digital thermometers

  4. Infrared, bimetallic stem, and glass

The correct answer is: Bi-metallic stem, thermocouple, thermistor

The correct answer highlights the types of thermometers that are specifically designed for measuring food temperatures accurately and reliably in a food service environment. Bi-metallic stem thermometers are widely used because they measure the internal temperature of food items. They are typically equipped with a dial that displays the temperature reading directly. Thermocouples are also suitable as they can provide rapid readings and are highly versatile, able to measure small and large volumes of food quickly and effectively. They utilize two metal wires to measure temperature, allowing for quick response time. Thermistors, on the other hand, are electronic devices that change resistance according to temperature and are known for their accuracy. They are particularly useful for monitoring the temperature of food items during cooking and holding. These types of thermometers are applicable in professional kitchens because they ensure food safety by allowing chefs and food handlers to monitor temperatures closely, thus preventing foodborne illness. Other options might refer to thermometers that may not meet the stringent requirements for precision, calibration, or rapid response that are necessary in food service settings.